low speed copy in virtual mashine with virtual fc

Good day. i`m sorry for my English and please help me. we have fujitsu bx900 s2 with brocade 5450, blades bx 924s4 with mc82fe adapter, storage - dx80s2. our problem is low speed copy in lun virtual mashine. lun was mapped by virtual fc san (npiv was enabled on default). in host the speed of copy is good 150-250 MB/sec. but on the switch we created fc zones by the ports - not by wwn - alliases created for ports. trafic isolated zones created liked basic zones. we have next zones:

zone1 port 1 - port 19 (for blade 1)

zone2 port 2 - port 19 (for blade 1)

zone3 port 3 - port 19 (for blade 1)

zone4 port 4 - port 20 (for blade 1)

zone5 port 5 - port 20 (for blade 1)

zone6 port 6 - port 20 (for blade 1)

ti zones like basic zones.

and me have 2 switches brocade. adapter mc82fe has 2 port - one for 1 switch? second for 2 switch.